Inspired by kirigami, a type of Japanese paper art, researchers have created a new material that transforms from a grid into ...
Abstract: In this study, actuator faults and unknown control directions are taken into account concurrently for a three-dimensional variable length flexible string system modeled by partial ...
39 x 10 in. (99.1 x 25.4 cm.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...
In 1980, Stephen Hawking gave his first lecture as Lucasian Professor at the University of Cambridge. The lecture was called “Is the end in sight for theoretical physics?” Hawking, who later became my ...
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Impact analysis on contact force between the rod and oil-tubing by rod string longitudinal vibration
Abstract: The wear of rod string and tubing in pump well is a common phenomenon, and the main cause is the longitudinal vibration of sucker rod. Considering the structural characteristics and load ...
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